6 layers150 × 60 mm

Logic macropad
Greentalinjo/74HController
A game controller built entirely from discrete 74HC logic - no microcontroller, a diode ROM and an 8-N-1 serial frame out of an RJ45 console port.
170 parts
Boards in 1 GitHub repository, designed in KiCad, that use the K2-1102DP-F4SW-04 by HRO Electronics (-25℃~+85℃ 100,000 cycles 12V 2.5N 50mA 6.5mm 6mm 6mm Round Button SPST Through Hole 插件-4P,6x6mm Tactile Switches ROHS). See how each wires it, with its parts, size, README and files; the K2-1102DP-F4SW-04’s symbol, footprint and pinout are on its own page.

Greentalinjo/74HController
A game controller built entirely from discrete 74HC logic - no microcontroller, a diode ROM and an 8-N-1 serial frame out of an RJ45 console port.